Police have a new "person of interest" in the investigation of ricin-laced letters sent to President Barack Obama, Mississippi U.S. Senator Roger Wicker and a county judge in Mississippi.
Authorities abruptly dropped charges against Paul Kevin Curtis, who they had arrested in the case last week.
Federal authorities offered no explanation as to why they released Curtis, a 45-year-old celebrity impersonator.
The FBI is now questioning and searching the home of James Everett Dutschke, a long-time rival of Curtis, who Curtis alleges may have framed him.
Both men have a history of run ins with law enforcement — Curtis for cyber-harassment and Dutschke for child molestation and indecent exposure.
- Lenny Bernstein, editor for The Washington Post's national desk.
This segment aired on April 24, 2013.